What this MCCB carries on the line
The Siemens SENTRON 3VA1180-5EF32-0BA0 is a 3-pole molded case circuit breaker rated for 80 A continuous current at 40 °C, and it holds that 80 A rating right up through 50 °C before it starts to derate — at 55 °C it's still good for 76.8 A, at 70 °C it's 72 A. That thermal curve matters if this breaker sits in a hot panel next to drives or transformers. Breaking capacity is the headline number here: 187 kA at 240 V, 121 kA at 415 V, and 75.6 kA at 440 V. Those are high-interrupt ratings — this breaker can clear a serious fault without welding its contacts shut or venting plasma into the enclosure. At 690 V it still manages 17 kA. This is a line-protection version (not a motor-protection or generator version), fitted with a TM240 thermal-magnetic overcurrent release and an undervoltage release (UVR) as the auxiliary trip. The UVR is a separate coil that trips the breaker when control voltage drops below a threshold — common in safety circuits or emergency-stop chains where loss of control power must open the main breaker.
Mounting and integration
The 3VA1180-5EF32-0BA0 measures 70 mm deep by 76.2 mm wide by 130 mm tall. That 70 mm depth is a standard MCCB footprint for panelboard and switchboard mounting — it fits Siemens 3VA mounting accessories and busbar systems without modification. Front IP40 protection means it's fine inside a closed panel; not for washdown areas. Operating temperature range is -25 °C to 70 °C, storage from -40 °C to 80 °C. That covers most indoor industrial environments short of a freezer or a foundry floor.